1.The USA/ most exciting/ country/ world.
=>The USA is the most exciting country in the world.
2.English/ most difficult/ subject/ school.
=>English is the most difficult subject at school.
3.Cheaper/ go/ by/ car/ train.
=>It's cheaper to go by car than train.
4.Motorbike/ good/ comfortable/ than/ bicycle.
=>Motorbike is better and more comfortable than bicycle.
5.August/ best/ month/ climb up/ Mount Fuji.
=>August is the best month to climb up Mount Fuji.
6.Polar bears/ largest/ predators/ land.
=>Polar bears is the largest predators on land.
7.Life/ big cities/ noisy/ than/ life/ country.
=>Life in big cities is noisier than life in country.
8.Gatwick/ far/ from my house/ than/ Heathrow.
=>Gatwick is farther from my house than Heathrow.
9.Neptune/ furthest/ planet/ the sun.
=>Neptune is the furthest planet from the sun.
10.Killer whales/ big/ fast/ than/ great white sharks.
=>Killer whales is bigger and faster than great white sharks.
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